Herramientas

Herrajes. Screw advance box joint jig version 2. After I built my original screw advance box joint jig I ended up using it quite a lot.

But over time, I realized the jig and plans could be improved on a bit. Primarily, I came up with a much better method of mounting the primary gears. With my old jig, I had to make a gear mount block for each primary gear. But over time, I ended up making quite a variety of primary gears to hit some of those odd intervals that I needed for various types of joints. So a big improvement was to come up with a mounting system that didn't require separate blocks for each primary gear. Other improvements involved simplifying the design where I could, and tweaking dimensions to allow for deeper cuts without cutting into the jig. This is the improved gear mounting block. The block has two holes for the bolt holding the gear. This picture shows how the block mounts. This photo shows the block placed in the upper position. This video shows the box joint jig being used to cut a finger joint. See also:
More links. Woodworking for engineers.

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